Question

Find the number of atoms oxygen present in 0.3 gram mole of( COOH)2.2H2O​

Answer 1

Explanation:

simply, 1 mole of (COOH)2.2H2O has 6 moles of Oxygen atoms. (adding them up)

therefore by using unitary method, if 1 mole contain 6 mole O atoms, 0.3 moles will contain 0.3×6 moles of atoms , I.e. 1.8 moles of Oxygen atoms.

NOTE - GRAM ATOM, GRAM MOLECULE,GRAM MOLES are all MOLES.